Presence is now a 'abstract' View, pull in members from program
This is signified by the removal of params['name'] and other values
that are required by params.py, but also by the removal of the 'view'
definition at the bottom of the file.
Patch by: Sverre Rabbelier
"""Multi-consumer multi-producer dispatching mechanism
Originally based on pydispatch (BSD) http://pypi.python.org/pypi/PyDispatcher/2.0.1
See license.txt for original license.
Heavily modified for Django's purposes.
"""
from django.dispatch.dispatcher import Signal